Kickapoo Valley Reserve Visitor Center
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Kickapoo Valley Reserve Visitor Center clear sky chart from 2005-11-06 to 2026-02-01.

This page is a summary of past forecasts. Even though it's based only on forecasts, some people use these pages as clue to a site's climate. But climate data based on actual observation should be preferred (if you can find it!).

Cloud, Transparency and Seeing forecasts are summarized individually. But because good observing conditions require a combination of minimum cloud cover, transparency and seeing, the individual forecast summaries can be difficult to interpret. The observing conditions section counts the combinations of conditions needed for common types of astronomical observation.

Observing Conditions

The following tables count the occurrence of the combinations of forecast and darkness conditions needed for different observations. Conditions are rated by by what percentage of the hours the observation would likely be attempted are usable.

Observation Type	Minimum conditions for hour to be usable				Out of hours
	Clear of Clouds	Transparency	Seeing	Sky Brightness
Planetary:	50%	(no limit)	Average	(no limit)	Nighttime Hours
Deep Sky:	70%	Average	(no limit)	5.9	Nighttime Hours
CCD Imaging:	70%	Below Average	Poor	(no limit)	Nighttime Hours

Percentages are of nighttime hours per month, or per year, when a particular observing conditions was met. Deep Sky percentages never exceed 50% because the moon is up half the time. Deep sky percentages are much lower for charts at high latitudes because of fewer dark hours in the summer.

Overall

By Month

Individual Forecasts

The length of each colored bar in the "occurrence of each Forecast" column is proportional to the number of times the chart forecast that color. The percentages are of the total number of hours per month, or per year, with a particular forecast. The colors as the same as those used in clear sky charts.

Note: Transparency probabilities are only counted for those hours that have 30% or less cloud cover. Seeing probabilities are only counted for those hours that have 80% or less cloud cover. If that's too tricky, try Observing Conditions instead.

Overall

		Occurrence of each Forecast	Data Points
Cloud Cover	Day	13% 9% 3 8% 5% 4 4 4 6% 7% 38%	128002
	Night	12% 10% 4 9% 5% 4 4 4 5% 6% 38%	124301
Transparency	Day	44% 5% 12% 25% 13% 1	131501
	Night	45% 5% 12% 23% 14% 1	128875
Seeing	Day	18% 12% 31% 24% 12% 3	17601
	Night	17% 11% 31% 30% 10% 1	27581

By Month

Percentage Cloud Cover SE (2006-)
Color Meanings: Overcast 90% covered 80% covered 70% covered 60% covered 50% covered 40% covered 30% covered 20% covered 10% covered Clear
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	6% 12% 7% 18% 9% 7% 5% 3 4 5% 25%	3697
	11th to 20th	Day	7% 11% 7% 11% 6% 4 5% 9% 9% 8% 24%	3700
	21st to end	Day	11% 15% 6% 10% 4 3 3 3 5% 6% 33%	4395
February	1st to 10th	Day	9% 11% 6% 10% 5% 6% 5% 4 5% 7% 31%	1800
	11th to 20th	Day	12% 11% 5% 8% 6% 4 4 4 6% 6% 35%	1804
	21st to end	Day	12% 11% 4 11% 6% 5% 4 3 4 7% 34%	1650
March	1st to 10th	Day	14% 8% 3 5% 3 3 3 3 4 6% 48%	4480
	11th to 20th	Day	11% 6% 2 7% 4 4 4 3 6% 8% 44%	4980
	21st to end	Day	22% 13% 3 8% 4 3 4 3 4 5% 30%	5776
April	1st to 10th	Day	17% 13% 4 7% 5% 4 4 4 5% 7% 31%	2400
	11th to 20th	Day	18% 12% 3 7% 6% 5% 5% 3 5% 6% 31%	2374
	21st to end	Day	19% 11% 3 8% 4 5% 5% 4 6% 6% 30%	2414
May	1st to 10th	Day	15% 8% 3 6% 4 4 4 4 5% 7% 42%	6312
	11th to 20th	Day	14% 6% 3 7% 4 4 4 4 5% 8% 40%	6319
	21st to end	Day	18% 6% 2 6% 5% 4 4 4 6% 8% 37%	6935
June	1st to 10th	Day	11% 6% 3 6% 4 4 4 4 6% 9% 44%	2800
	11th to 20th	Day	13% 6% 2 6% 5% 4 5% 5% 5% 9% 40%	2800
	21st to end	Day	13% 6% 3 6% 6% 4 5% 3 6% 9% 39%	2800
July	1st to 10th	Day	9% 5% 2 7% 5% 5% 6% 5% 8% 10% 39%	6360
	11th to 20th	Day	7% 5% 2 6% 3 5% 5% 4 7% 9% 47%	6360
	21st to end	Day	9% 6% 3 7% 5% 5% 5% 4 6% 9% 40%	6924
August	1st to 10th	Day	8% 6% 2 7% 5% 6% 5% 5% 7% 8% 41%	4381
	11th to 20th	Day	13% 6% 2 6% 4 5% 4 4 5% 8% 45%	4072
	21st to end	Day	10% 6% 2 6% 4 4 5% 5% 7% 9% 43%	4312
September	1st to 10th	Day	13% 6% 2 5% 4 4 5% 3 6% 8% 44%	2400
	11th to 20th	Day	11% 7% 2 5% 4 4 4 4 5% 8% 45%	2390
	21st to end	Day	13% 6% 3 6% 4 4 4 3 5% 8% 44%	2151
October	1st to 10th	Day	13% 7% 2 6% 4 4 4 3 4 6% 48%	2000
	11th to 20th	Day	18% 9% 3 7% 4 4 4 3 6% 6% 38%	2000
	21st to end	Day	16% 11% 3 7% 5% 4 4 3 4 6% 39%	2066
November	1st to 10th	Day	13% 9% 3 7% 5% 4 3 3 5% 8% 40%	1852
	11th to 20th	Day	14% 13% 4 10% 6% 4 4 3 4 7% 32%	1770
	21st to end	Day	12% 12% 4 10% 5% 4 4 2 5% 6% 36%	1680
December	1st to 10th	Day	8% 9% 5% 11% 5% 6% 5% 4 6% 7% 33%	2690
	11th to 20th	Day	13% 15% 6% 10% 7% 5% 5% 3 5% 8% 23%	3088
	21st to end	Day	16% 22% 9% 13% 6% 4 4 3 4 4 15%	4070
January	1st to 10th	Night	7% 10% 6% 15% 8% 6% 4 4 5% 6% 30%	6488
	11th to 20th	Night	8% 13% 6% 14% 6% 5% 7% 6% 9% 6% 20%	6500
	21st to end	Night	10% 14% 8% 11% 5% 4 4 4 5% 6% 30%	6821
February	1st to 10th	Night	8% 13% 6% 11% 6% 6% 5% 4 4 5% 32%	2601
	11th to 20th	Night	10% 10% 4 9% 6% 5% 5% 3 4 5% 39%	2483
	21st to end	Night	14% 12% 3 8% 5% 4 4 3 4 6% 36%	1980
March	1st to 10th	Night	13% 8% 3 8% 4 3 4 4 5% 5% 43%	5373
	11th to 20th	Night	10% 8% 2 7% 4 4 5% 3 6% 8% 44%	5009
	21st to end	Night	23% 12% 3 10% 4 4 3 2 4 5% 29%	5152
April	1st to 10th	Night	17% 10% 3 8% 5% 4 4 3 4 6% 37%	2000
	11th to 20th	Night	19% 8% 2 6% 5% 3 4 3 5% 7% 38%	1975
	21st to end	Night	19% 8% 2 6% 4 4 5% 3 6% 7% 35%	1985
May	1st to 10th	Night	15% 7% 3 5% 4 4 4 4 5% 6% 43%	3600
	11th to 20th	Night	10% 6% 2 5% 4 3 4 3 6% 7% 50%	3596
	21st to end	Night	15% 7% 2 6% 5% 4 4 4 6% 8% 38%	3942
June	1st to 10th	Night	10% 5% 2 5% 4 4 4 4 7% 9% 45%	1600
	11th to 20th	Night	11% 6% 3 7% 5% 4 3 3 5% 9% 45%	1600
	21st to end	Night	10% 6% 2 6% 4 3 4 3 6% 8% 48%	1600
July	1st to 10th	Night	11% 6% 2 6% 4 4 4 3 6% 8% 46%	3618
	11th to 20th	Night	6% 6% 2 4 3 3 4 4 7% 8% 53%	3617
	21st to end	Night	6% 6% 2 6% 4 4 5% 4 8% 8% 47%	3947
August	1st to 10th	Night	10% 5% 2 5% 4 4 5% 4 5% 8% 49%	2776
	11th to 20th	Night	10% 6% 2 6% 3 3 3 3 5% 6% 51%	2984
	21st to end	Night	10% 5% 2 6% 3 4 4 3 6% 7% 50%	3586
September	1st to 10th	Night	10% 5% 3 5% 4 3 4 3 5% 7% 53%	2000
	11th to 20th	Night	12% 5% 2 4 4 4 3 4 4 8% 51%	2000
	21st to end	Night	10% 5% 2 5% 4 3 3 3 5% 6% 53%	2235
October	1st to 10th	Night	12% 6% 3 5% 4 3 4 3 4 5% 51%	2400
	11th to 20th	Night	16% 7% 2 7% 4 3 4 4 5% 7% 42%	2400
	21st to end	Night	16% 10% 3 6% 4 4 4 4 6% 6% 37%	2772
November	1st to 10th	Night	13% 9% 3 6% 4 4 4 3 5% 5% 43%	2666
	11th to 20th	Night	12% 12% 4 10% 6% 5% 3 3 5% 6% 34%	2846
	21st to end	Night	15% 11% 4 10% 4 4 4 3 4 6% 36%	2940
December	1st to 10th	Night	7% 8% 3 9% 6% 7% 5% 4 6% 8% 35%	4720
	11th to 20th	Night	12% 17% 7% 12% 6% 5% 5% 4 4 5% 23%	5339
	21st to end	Night	19% 17% 7% 14% 6% 4 4 3 4 5% 17%	7150

Transparency (when cloud cover <= 30%)
Color Meanings: Too cloudy to forecast Poor Below Average Average Above average Transparent
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	61% 4 10% 18% 7%	3698
	11th to 20th	Day	53% 5% 10% 15% 17%	3700
	21st to end	Day	53% 4 13% 19% 11%	4395
February	1st to 10th	Day	51% 6% 14% 17% 11% 1	1800
	11th to 20th	Day	48% 5% 12% 24% 9% 2	1813
	21st to end	Day	51% 4 11% 20% 11% 3	1650
March	1st to 10th	Day	39% 4 12% 28% 14% 4	4480
	11th to 20th	Day	37% 4 15% 29% 12% 2	4980
	21st to end	Day	57% 5% 10% 15% 12% 2	5778
April	1st to 10th	Day	53% 5% 11% 20% 10% 1	2400
	11th to 20th	Day	53% 5% 9% 21% 10% 2	2374
	21st to end	Day	52% 7% 11% 18% 11% 1	2414
May	1st to 10th	Day	40% 5% 10% 26% 17% 2	6350
	11th to 20th	Day	40% 6% 12% 28% 13% 1	6323
	21st to end	Day	43% 6% 11% 26% 12% 1	6949
June	1st to 10th	Day	36% 7% 14% 28% 15% 2	2800
	11th to 20th	Day	40% 7% 14% 22% 15% 1	2800
	21st to end	Day	42% 7% 14% 23% 13% 2	2800
July	1st to 10th	Day	37% 6% 18% 31% 7% 1	6291
	11th to 20th	Day	32% 6% 15% 31% 16% 1	6285
	21st to end	Day	39% 6% 14% 23% 17% 1	6728
August	1st to 10th	Day	38% 7% 14% 27% 13% 1	4366
	11th to 20th	Day	37% 5% 13% 32% 13%	4111
	21st to end	Day	36% 5% 14% 30% 13% 1	4311
September	1st to 10th	Day	37% 6% 13% 26% 17% 1	2400
	11th to 20th	Day	37% 6% 14% 31% 12% 1	2390
	21st to end	Day	38% 6% 11% 31% 13% 1	2151
October	1st to 10th	Day	24% 3 7% 42% 23% 1	3260
	11th to 20th	Day	36% 5% 10% 27% 20% 3	3240
	21st to end	Day	43% 3 11% 29% 12% 1	3317
November	1st to 10th	Day	42% 5% 13% 23% 15% 2	1852
	11th to 20th	Day	53% 5% 11% 22% 9% 1	1770
	21st to end	Day	49% 5% 15% 22% 8% 1	1680
December	1st to 10th	Day	50% 6% 16% 20% 8% 1	2690
	11th to 20th	Day	60% 5% 12% 17% 6% 1	3085
	21st to end	Day	73% 4 7% 11% 4	4070
January	1st to 10th	Night	54% 5% 10% 21% 9% 1	6488
	11th to 20th	Night	59% 5% 10% 12% 14%	6500
	21st to end	Night	54% 4 11% 18% 12%	6821
February	1st to 10th	Night	53% 5% 11% 19% 11% 1	2601
	11th to 20th	Night	47% 5% 12% 24% 12% 1	2484
	21st to end	Night	49% 5% 12% 21% 11% 2	1980
March	1st to 10th	Night	43% 4 11% 25% 11% 6%	5373
	11th to 20th	Night	38% 4 12% 29% 14% 3	5009
	21st to end	Night	59% 4 9% 16% 11% 1	5152
April	1st to 10th	Night	49% 5% 9% 21% 15% 2	2000
	11th to 20th	Night	46% 5% 10% 21% 16% 3	1975
	21st to end	Night	46% 6% 12% 20% 13% 2	1985
May	1st to 10th	Night	40% 6% 10% 22% 21% 1	3624
	11th to 20th	Night	32% 6% 14% 24% 20% 3	3597
	21st to end	Night	41% 8% 10% 26% 14% 1	3950
June	1st to 10th	Night	33% 7% 14% 28% 17% 1	1600
	11th to 20th	Night	36% 6% 11% 26% 18% 2	1600
	21st to end	Night	33% 8% 14% 25% 16% 4	1600
July	1st to 10th	Night	35% 5% 16% 29% 13% 2	3580
	11th to 20th	Night	28% 5% 15% 34% 17% 1	3572
	21st to end	Night	32% 6% 18% 24% 18% 2	3832
August	1st to 10th	Night	33% 6% 13% 28% 19% 2	2767
	11th to 20th	Night	33% 5% 14% 31% 15% 1	3011
	21st to end	Night	33% 5% 14% 27% 18% 2	3586
September	1st to 10th	Night	31% 5% 11% 29% 23% 1	2000
	11th to 20th	Night	34% 5% 12% 32% 16% 1	2000
	21st to end	Night	31% 5% 11% 31% 21% 1	2235
October	1st to 10th	Night	26% 3 6% 35% 28% 2	3920
	11th to 20th	Night	31% 4 11% 28% 25% 1	3899
	21st to end	Night	45% 4 10% 26% 15% 1	4471
November	1st to 10th	Night	41% 5% 12% 25% 15% 2	2666
	11th to 20th	Night	52% 5% 13% 19% 10% 2	2846
	21st to end	Night	51% 4 12% 25% 7% 1	2940
December	1st to 10th	Night	45% 5% 19% 24% 6%	4720
	11th to 20th	Night	63% 5% 10% 15% 6%	5341
	21st to end	Night	70% 4 8% 12% 6%	7150

Seeing (when cloud cover <= 80%)
Color Meanings: Too cloudy to forecast Bad 1/5 Poor 2/5 Average 3/5 Good 4/5 Excellent 5/5
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	16% 19% 36% 20% 6% 3	330
	11th to 20th	Day	20% 21% 38% 15% 5% 1	330
	21st to end	Day	21% 19% 36% 20% 4	363
February	1st to 10th	Day	17% 23% 38% 17% 3 2	300
	11th to 20th	Day	20% 24% 38% 14% 4	300
	21st to end	Day	21% 24% 41% 13% 2	249
March	1st to 10th	Day	22% 19% 42% 13% 4	300
	11th to 20th	Day	24% 19% 34% 16% 6% 2	300
	21st to end	Day	30% 14% 32% 16% 8% 1	463
April	1st to 10th	Day	29% 16% 35% 17% 3	500
	11th to 20th	Day	30% 17% 26% 17% 8% 2	492
	21st to end	Day	25% 14% 31% 20% 7% 2	500
May	1st to 10th	Day	20% 15% 30% 25% 8% 2	696
	11th to 20th	Day	20% 14% 29% 23% 12% 3	725
	21st to end	Day	20% 10% 28% 23% 14% 4	789
June	1st to 10th	Day	11% 8% 30% 32% 16% 3	730
	11th to 20th	Day	17% 9% 35% 25% 13% 2	730
	21st to end	Day	15% 9% 32% 28% 13% 3	730
July	1st to 10th	Day	9% 4 23% 29% 25% 10%	721
	11th to 20th	Day	9% 7% 29% 31% 18% 7%	718
	21st to end	Day	7% 4 29% 35% 18% 7%	794
August	1st to 10th	Day	8% 5% 24% 33% 23% 8%	726
	11th to 20th	Day	16% 5% 21% 28% 22% 9%	655
	21st to end	Day	12% 9% 22% 30% 21% 7%	583
September	1st to 10th	Day	16% 8% 24% 28% 17% 6%	530
	11th to 20th	Day	13% 6% 23% 32% 20% 5%	530
	21st to end	Day	17% 12% 26% 24% 16% 4	481
October	1st to 10th	Day	15% 12% 33% 28% 10% 2	330
	11th to 20th	Day	25% 17% 37% 15% 6%	330
	21st to end	Day	23% 20% 34% 17% 4 2	363
November	1st to 10th	Day	21% 16% 38% 18% 5% 2	330
	11th to 20th	Day	22% 18% 38% 17% 4 1	330
	21st to end	Day	23% 17% 41% 15% 4	330
December	1st to 10th	Day	15% 21% 41% 17% 6%	330
	11th to 20th	Day	21% 18% 38% 18% 5%	330
	21st to end	Day	29% 18% 37% 13% 3 1	363
January	1st to 10th	Night	14% 17% 36% 26% 7% 1	1050
	11th to 20th	Night	19% 15% 38% 24% 5% 1	1050
	21st to end	Night	18% 13% 37% 27% 5% 1	1155
February	1st to 10th	Night	15% 17% 35% 26% 6% 1	1001
	11th to 20th	Night	15% 16% 40% 22% 6%	929
	21st to end	Night	21% 16% 37% 22% 4	660
March	1st to 10th	Night	20% 14% 36% 24% 6% 1	800
	11th to 20th	Night	18% 13% 34% 26% 7%	616
	21st to end	Night	25% 9% 30% 28% 7% 1	660
April	1st to 10th	Night	21% 14% 38% 23% 5%	600
	11th to 20th	Night	23% 11% 32% 27% 6%	593
	21st to end	Night	23% 10% 31% 27% 8% 1	600
May	1st to 10th	Night	20% 9% 32% 33% 7% 1	600
	11th to 20th	Night	17% 8% 32% 32% 11% 1	591
	21st to end	Night	16% 6% 29% 34% 13% 1	650
June	1st to 10th	Night	11% 7% 29% 41% 11% 1	600
	11th to 20th	Night	13% 5% 32% 38% 12%	600
	21st to end	Night	12% 5% 25% 42% 16% 1	600
July	1st to 10th	Night	7% 2 18% 41% 29% 3	585
	11th to 20th	Night	9% 3 20% 43% 22% 3	582
	21st to end	Night	7% 2 18% 48% 22% 3	657
August	1st to 10th	Night	8% 2 17% 46% 26% 2	597
	11th to 20th	Night	13% 3 15% 38% 25% 6%	594
	21st to end	Night	12% 3 19% 40% 23% 3	660
September	1st to 10th	Night	12% 5% 23% 37% 17% 6%	600
	11th to 20th	Night	15% 3 23% 32% 22% 4	600
	21st to end	Night	12% 9% 26% 36% 15% 2	790
October	1st to 10th	Night	15% 8% 29% 30% 18% 1	800
	11th to 20th	Night	19% 12% 34% 27% 8% 1	800
	21st to end	Night	22% 11% 31% 29% 6% 1	880
November	1st to 10th	Night	18% 11% 35% 27% 8%	820
	11th to 20th	Night	18% 17% 38% 21% 6%	956
	21st to end	Night	20% 16% 33% 24% 6%	1050
December	1st to 10th	Night	18% 13% 40% 23% 5% 1	1050
	11th to 20th	Night	22% 15% 35% 23% 5%	1050
	21st to end	Night	27% 14% 33% 22% 4	1155

Page generated at 2026-01-29 00:21:42. Version ac07

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